AI Assistants for C# (.NET) Developers: Tool Overview

AI Assistants for C# (.NET) Developers: Tool Overview

The .NET ecosystem continues to actively evolve, and one of the main trends of 2024–2025 has been the integration of artificial intelligence into everyday development. Modern AI tools can not only suggest code but also generate entire methods, write tests, and even refactor legacy C# projects. Let's look at the most useful solutions for .NET developers.

1. GitHub Copilot — Universal Assistant

The undisputed leader among AI assistants. It works on the OpenAI Codex engine and understands C# syntax perfectly. Copilot can:

• Suggest autocompletions directly while typing code;
• Generate complex constructs (LINQ queries, async/await, design patterns);
• Write unit tests for existing classes;
• Create XML-comments documentation.

The tool integrates with Visual Studio, VS Code, and JetBrains Rider. It is especially useful when working with ASP.NET Core and Entity Framework.

2. JetBrains ReSharper with AI Assistant

The popular ReSharper plugin has received a built-in AI engine. Its main capabilities:

• Smart refactoring: the neural network suggests optimal code restructuring options;
• Code generation from comments in Russian or English;
• Analysis of the entire solution and detection of potential bugs;
• Quick creation of controllers, services, and DTO models.

Important: ReSharper AI works locally and does not send code to external servers — a plus for enterprise projects with high security requirements.

3. Visual Studio IntelliCode

A free extension from Microsoft that uses machine learning to enhance IntelliSense. Features:

• Prediction of the next symbol based on context;
• Code style recommendations based on analysis of thousands of open-source C# projects;
• Automatic completion of method arguments.

IntelliCode works great with .NET MAUI and Blazor, helping beginners learn syntax faster.

4. Sourcegraph Cody

A free open-source tool that understands the entire codebase. For C# (.NET), Cody can:

• Explain complex code in natural language;
• Find dependencies between classes and determine how to safely make changes;
• Generate migrations for Entity Framework;
• Help with configuring DI containers.

Cody works as an extension for VS Code and JetBrains IDE, and supports working with Git repositories.

5. Tabnine — Private AI Assistant

A popular tool that can be trained on your own codebase. For .NET developers, Tabnine offers:

• Completion of lines and entire code blocks;
• Creation of templates for frequently used patterns (Repository, Unit of Work, Mediator);
• Support for all modern C# versions (from 9.0 to 12.0).

Special feature: Tabnine can work completely offline, which is important for isolated development environments.

Summary and Recommendations

The choice of tool depends on your tasks:

• For quick code and test generation — GitHub Copilot;